On Thursday, arguments will be heard on whether Henri van Breda will testify before or after experts chosen by his defence team.
The State concluded its case on Monday.
Van Breda's legal team has asked that their three experts testify first, before the triple murder accused takes to the stand when the case resumes.
The 22-year-old is on trial for the murder of his parents and older brother.
He has also been charged with the attempted murder of his younger sister.
State prosecution has argued that Van Breda could amend his version of events, if his witnesses testify before him.
However, the defence says that Van Breda had outlined his account of what happened in a detailed plea explanation.
Criminal lawyer Cliff Alexander says it is common practice for expert witnesses to testify first - in a bid to reduce legal costs - unless the State objects.
The judge will have to determine whether its in the interest of justice.— Cliff Alexander, criminal lawyer
According to Alexander, the decision to hear expert witnesses first is a procedural matter.
What generally happens is that the accused testifies first and thereafter all other witnesses testify.— Cliff Alexander, criminal lawyer
The State is concerned that Van Breda will tailor evidence and testimony according to the expert testimony before him, he explains.
Take a listen: